On all of our PCs, whenever a CC application is open, every 5-10 seconds, the cursor will change to a wait cursor for about a second. This is continuous, and happens even when nothing is open in the application.
I traced the issue to "C:\Program Files (x86)\Adobe\Adobe Creative Cloud\CCLibrary\CCLibrary.exe". As far as I can tell, it's executing and crashing in a loop. If I close all CC applications, then rename or delete CCLibrary.exe, the problem goes away. Alternatively, if I close "Libraries" in a CC application, then close and re-open the application, the problem goes away. Most of our users don't use Libraries, but I still need it working for those that do. The problem exists on Windows 7 and Windows 10, on different hardware, and at different sites. We're using the latest 2017 versions.